title: [Cyclic changes in blood gases and pH (author's transl)].
mesh_terms: D002245:Carbon Dioxide / Q000097:blood*; D002940:Circadian Rhythm; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood*
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen